Enhanced protective performance of a waterborne coating

Microcontainers loaded with inhibitors were incorporated into a waterborne matrix to strenghten its protective performance.

Significant improvements have been noted in terms of corrosion resistance.  Image source: blabla5 - Pixabay (symbol image).

For a new study, the corrosion inhibitors Zinc oleate and 8-Hydroxyquinoline were successfully encapsulated using an interfacial polyaddition method. As such they were dispersed at different concentrations within a waterborne coating matrix. The resulting composite coatings were applied to the low carbon steel substrates. Successful synthesis and morphological characteristics of microcontainers loaded with inhibitors were confirmed using various characterisation techniques.

Significant improvements in terms of corrosion resistance

Electrochemical impedance spectroscopy was used to determine the anticorrosive performance of the samples continuously exposed to various corrosive environments of salt and humidity chambers and NaCl solution. Special emphasis was placed on adhesion testing and visual observations during the exposure period. Significant improvements have been noted in terms of corrosion resistance, which, however, depend on the type of inhibitor used, the concentration of the containers embedded in the coating matrix and on the characteristics of the corrosive environment.

The study has been published in Progress in Organic Coatings, Volume 157, August 2021.

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